petsc-3.9.2 2018-05-20
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MatMFFDSetFunctioniBase

Sets the base vector for a single component function evaluation

Synopsis

#include "petscmat.h"   
PetscErrorCode  MatMFFDSetFunctioniBase(Mat mat,PetscErrorCode (*func)(void*,Vec))
Logically Collective on Mat

Input Parameters

mat - the matrix free matrix created via MatCreateSNESMF()
func - the function to use

Notes

If you use this you MUST call MatAssemblyBegin()/MatAssemblyEnd() on the matrix free matrix inside your compute Jacobian routine. This function is necessary to compute the diagonal of the matrix.

Keywords

SNES, matrix-free, function

See Also

MatCreateSNESMF(),MatMFFDGetH(), MatCreateMFFD(), MATMFFD
MatMFFDSetHHistory(), MatMFFDResetHHistory(), SNESetFunction(), MatGetDiagonal()

Level

advanced

Location

src/mat/impls/mffd/mffd.c

Implementations

MatMFFDSetFunctioniBase_MFFD in src/mat/impls/mffd/mffd.c

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